OSTRACOD-BASED RECONSTRUCTION OF BOTTOM WATER CONDITIONS IN THE INNER SEA OF THE MALDIVES DURING THE PLEISTOCENE (IODP SITE U1467, NORTHERN INDIAN OCEAN)
Site U1467 was cored to 630 m below the sea floor in the Inner Sea at a water depth of 487 m. Because of its location in the center of The Maldives, the Inner Sea is a natural sediment trap. Cores recovered at this site yielded a continuous Miocene to Holocene sedimentary sequence with abundant and well-preserved calcareous microfossils, including ostracods. The focus of this study is to reconstruct glacial/interglacial changes in bottom water ventilation and circulation, and changes in the OMZ related to Monsoon dynamics throughout the Pleistocene by analyzing the deep-sea ostracod record at Site U1467. Ostracods will be compared and discussed within a multiproxy dataset including benthic foraminifera, alkenones, stable isotopes, sediment physical properties, and X-ray fluorescence spectrometry. Results show that ostracod variability reflects Pleistocene changes in sea-level, bottom water ventilation, and monsoon intensification in the northern Indian Ocean.